1. Henrik Björklund and Thomas Schwentick.
    On notions of regularity for data languages.
    Theor. Comput. Sci. 411(4-5):702–715, 2010.
    URL, DOI BibTeX

    @article{DBLP:journals/tcs/BjorklundS10,
    	author = {Henrik Bj{\"{o}}rklund and Thomas Schwentick},
    	title = "On notions of regularity for data languages",
    	journal = "Theor. Comput. Sci.",
    	year = 2010,
    	volume = 411,
    	number = "4-5",
    	pages = "702--715",
    	url = "http://dx.doi.org/10.1016/j.tcs.2009.10.009",
    	doi = "10.1016/j.tcs.2009.10.009",
    	timestamp = "Tue, 18 Nov 2014 21:30:19 +0100",
    	biburl = "http://dblp.uni-trier.de/rec/bib/journals/tcs/BjorklundS10",
    	bibsource = "dblp computer science bibliography, http://dblp.org"
    }
    

  1. Georg Gottlob, Zoltán Miklós and Thomas Schwentick.
    Generalized hypertree decompositions: NP-hardness and tractable variants.
    J. ACM 56(6), 2009.
    URL, DOI BibTeX

    @article{DBLP:journals/jacm/GottlobMS09,
    	author = "Georg Gottlob and Zolt{\'{a}}n Mikl{\'{o}}s and Thomas Schwentick",
    	title = "Generalized hypertree decompositions: NP-hardness and tractable variants",
    	journal = "J. {ACM}",
    	year = 2009,
    	volume = 56,
    	number = 6,
    	url = "http://doi.acm.org/10.1145/1568318.1568320",
    	doi = "10.1145/1568318.1568320",
    	timestamp = "Tue, 18 Nov 2014 21:31:20 +0100",
    	biburl = "http://dblp.uni-trier.de/rec/bib/journals/jacm/GottlobMS09",
    	bibsource = "dblp computer science bibliography, http://dblp.org"
    }
    

  1. Mikolaj Bojanczyk, Anca Muscholl, Thomas Schwentick and Luc Segoufin.
    Two-variable logic on data trees and XML reasoning.
    J. ACM 56(3), 2009.
    URL, DOI BibTeX

    @article{DBLP:journals/jacm/BojanczykMSS09,
    	author = "Mikolaj Bojanczyk and Anca Muscholl and Thomas Schwentick and Luc Segoufin",
    	title = "Two-variable logic on data trees and {XML} reasoning",
    	journal = "J. {ACM}",
    	year = 2009,
    	volume = 56,
    	number = 3,
    	url = "http://doi.acm.org/10.1145/1516512.1516515",
    	doi = "10.1145/1516512.1516515",
    	timestamp = "Tue, 18 Nov 2014 21:31:15 +0100",
    	biburl = "http://dblp.uni-trier.de/rec/bib/journals/jacm/BojanczykMSS09",
    	bibsource = "dblp computer science bibliography, http://dblp.org"
    }
    

  1. Rainer Lütticke, Herrman Helbig and Christian Eichhorn.
    Das Virtuelle Informatik-Labor VILAB - Konzeption, technische Realisierung und Einsatz in der Lehre.
    FernUniversität in Hagen, 2005.
    PDF BibTeX

    @techreport{luetticke_helbig_eichhorn05,
    	author = {L{\"{u}}tticke, Rainer and Helbig, Herrman and Eichhorn, Christian},
    	institution = {FernUniversit{\"{a}}t in Hagen},
    	series = "Informatik-Berichte",
    	title = "Das {V}irtuelle {I}nformatik-{L}abor {VILAB} - {K}onzeption, technische {R}ealisierung und {E}insatz in der {L}ehre",
    	volume = 321,
    	year = 2005,
    	pdf = "http://pi7.fernuni-hagen.de/papers/luetticke-helbig-eichhorn-2005-hagen.pdf"
    }